Viewing archive of Wednesday, 10 June 1998
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 1998 Jun 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 161 Issued at 2200Z on 10 JUN 1998IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z SOLAR ACTIVITY WAS LOW. TWO C1 X-RAY EVENTS OCCURRED AT
10/0223 AND 10/0402UT RESPECTIVELY. REGIONS 8240 (S28W55) AND 8241
(S24E06) SHOWED SOME MINOR GROWTH IN PLAGE AREA AND SPOT COUNT. THE
REST OF THE VISIBLE REGIONS REMAINED STABLE.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
LOW. LEVELS MAY INCREASE ON 12 JUN WHEN OLD REGION 8226 (N18, L-210)
IS DUE TO RETURN. REGION 8226 PRODUCED MAJOR FLARES AND APPEARED TO
BE GROWING IN SIZE AND INTENSITY WHEN IT CROSSED THE WEST LIMB ON 29
MAY.
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. THE GREATER THAN 2 MEV
ELECTRON FLUX AT GEOSYNCHRONOUS ORBIT BEGAN THE PERIOD AT HIGH
LEVELS AND THEN DECREASED TO BELOW THRESHOLD LEVELS AT 10/1000UT.
THEY HAVE REMAINED AT MODERATE LEVELS FOR THE REST OF THE PERIOD.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED. ISOLATED ACTIVE PERIODS ARE
POSSIBLE, ESPECIALLY ON 12 JUN DUE TO THE CME OBSERVED ON 8 JUN.
III. Event Probabilities 11 JUN to 13 JUN
| Class M | 10% | 10% | 10% |
| Class X | 01% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 10 JUN 112 Predicted 11 JUN-13 JUN 112/115/120 90 Day Mean 10 JUN 110
V. Geomagnetic A Indices
OBSERVED AFR/AP 09 JUN 008/010 ESTIMATED AFR/AP 10 JUN 009/012 PREDICTED AFR/AP 11 JUN-13 JUN 007/008-010/010-007/008
VI. Geomagnetic Activity Probabilities 11 JUN to 13 JUN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 20% |
| Minor storm | 05% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 30% | 30% |
| Minor storm | 05% | 15% | 15% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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